873-83-6Relevant articles and documents
Short time modification of carboxylated multi-wall nanotubes with amino uracil derivative
Zomorodbakhsh, Shahab,Mirza, Behrooz,Yazdizadeh, Shima,Tavahodi, Ehsan
, p. 1379 - 1383 (2014)
In this study, the chemical functionalization of carboxylated multi-walled carbon nanotubes (MWNT-COOH) by Amino uracil derivative via microwave- assisted amidation method have been investigated.The functionalized MWNTs were characterized by Fourier Transform Infrared spectroscopy (FT-IR), Raman spectroscopy, elemental analysis and scanning electron microscopy (SEM). The major advantage of this procedure is reducing the reaction time to the order of minutes and the amidation was completed in one step as compared to two in the conventional approach. The acid chloride formation step was eliminated here.
Preparation method for 4-amino-2,6-dimethoxypyrimidine
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Paragraph 0034-0037; 0048-0050, (2020/05/02)
The invention discloses a preparation method for 4-amino-2,6-dimethoxy pyrimidine. According to the method, with cyanoacetate and urea as raw materials, the 4-amino-2,6-dimethoxypyrimidine is synthesized through a cyclization and methylation two-step method. The preparation method provided by the invention shortens production process steps, optimizes reaction conditions, improves the reaction yield, solves the problem that a large amount of colored phosphorus-containing wastewater is generated in the original process, and provides an effective way for efficient green industrial production of the 4-amino-2,6-dimethoxypyrimidine.
Method for preparing 4-amino-2,6-dihydroxypyrimidine by virtue of dry frying process
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Paragraph 0021-0022; 0023-0024; 0025-0026, (2018/04/03)
The invention belongs to the field of medicinal chemical synthesis and in particular relates to a method for preparing 4-amino-2,6-dihydroxypyrimidine by virtue of a dry frying process. The method forpreparing 4-amino-2,6-dihydroxypyrimidine by virtue of the dry frying process comprises the following concrete steps: by taking sodium methoxide dry powder, urea and methyl cyanoacetate as raw materials, reacting under certain conditions, heating at a certain temperature, steaming out generated methanol, and finally generating 4-amino-2,6-dihydroxypyrimidine. According to the invention, yield of4-aminopyrimidine obtained through cyclization reaction can reach 80-85%, and product purity is more than 99%. Compared with a liquid-phase cyclization method, the method provided by the invention hasthe advantages that reaction yield can be improved by more than 15%, reaction period is reduced to be 2-3 hours from the original more than 8 hours, and no water methanol is produced, so that pollution of organic wastewater is greatly reduced, preparation cost and energy consumption of 4-amino-2,6-dihydroxypyrimidine are greatly reduced, and the method provided by the invention is hopeful to being applied to industrial production.